leabed is a simple console inactivity time meter. It can be
extremely useful it shell scripts for various autmated things. For
example, it can help you to turn on your answering machine on (with
removing vgetty lock file) or start any kind of a program when you're
away from your box for some time. With periodical checks from cron it
can tell you if someone used your computer while you were away, etc.

Command line options

-c, --current
show idle time only for the current console

-h, --human-readable
print time period in human readable format (default)